Dodgers prospect Alex Guerrero was taken to a plastic surgeon after a portion of his ear was bitten off by Albuquerque Isotopes teammate Miguel Olivo on Tuesday during a Triple-A game in Salt Lake City, Utah.

Local police were called to the ballpark, which was hosting an estimated 12,000 elementary school students for the game at 10:30 a.m. local time. Authorities interviewed several witnesses about the incident but no charges had been filed as of Tuesday evening.

The argument began during a pitching change with two outs in the bottom of the seventh inning. Olivo, the Isotopes’ catcher, argued with the shortstop Guerrero over a play at second base, believed to be when Salt Lake Bees runner J.B. Shuck safely stole second base.

Several teammates – first baseman Clint Robinson, second baseman Carlos Triunfel, third baseman Walter Ibarra – had to come between the players to prevent a fight from breaking out on the mound.

After the final out of the inning, the players returned to the dugout. Guerrero, who was due to bat fourth in the inning, was walking over to grab a helmet and bat when Olivo punched him, according to Guerrero’s agent Scott Boras.

The game was delayed while teammates tried to separate Olivo and Guerrero. During the scrum, Olivo managed to bite off a portion of Guerrero’s left ear.

Both players were removed from the game and immediately replaced.

Since Guerrero bats right-handed and the injury is to his left ear, he might have difficulty putting on a batting helmet with a flap covering his left ear. Boras didn’t know how much time Guerrero would need to recover.

“Obviously it’s a sizeable injury if you need a plastic surgeon,” Boras said.

The Dodgers issued a statement Tuesday afternoon saying “the baseball operations department is aware of the altercation and is conducting an investigation into the matter. The organization does not condone this type of behavior and will have no further comment at this time.”

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Guerrero and Olivo are currently on the Dodgers’ 40-man roster, and both players have appeared in the major leagues this season.

Guerrero, 27, signed a four-year, $28 million contract last October. He appeared in two games this season, striking out in his only at-bat, before being sent to Triple-A to hone his defense.

Olivo, 35, attended spring training on a minor-league contract and was added to the Dodgers’ major-league roster April 30. He batted .217 with 12 strikeouts in 23 at-bats before he was optioned to Albuquerque on May 14.

On the mend

Angels outfielder Kole Calhoun went 2 for 5 and scored a run in the game, his fifth consecutive rehabilitation game with Salt Lake. Calhoun is batting .500 (11 for 22) in the five games and is “ready to go,” in the words of teammate David Freese.

“(Calhoun) looked good,” said Freese, whose rehab assignment ended Monday. “Every day he got better. I think the thing with him is, recovering after a night game and getting back the next day, feeling like he’s progressing, and he is. He’s ready to get back here too.”

Angels manager Mike Scioscia said that “there’s a chance” Calhoun could be back in Anaheim today. The 26-year-old right fielder has missed 31 games since turning his ankle in an April 15 game.

Outfielder Josh Hamilton will began a rehabilitation stint with Triple-A Salt Lake on Thursday. Hamilton said he’s never needed more than three minor-league rehabilitation games before coming off the disabled list in his career and “that’d be a good start.”

Dane De La Rosa (shoulder) was expected to begin his rehab assignment with Salt Lake today.

Also ...

Luis Jimenez was optioned to Salt Lake to make room for Freese on the Angels’ active roster. Jimenez batted .160 (4 for 25) in nine games and didn’t make an error in 22 chances at third base. ... Scioscia declined to name his starter for Saturday’s game against the Kansas City Royals. He hasn’t ruled out skipping Matt Shoemaker’s turn in the rotation in order to create roster space for the spate of players – up to six – returning from the disabled list in a seven-day span. “There won’t be any surprises,” Scioscia said. ... Mike Trout was the Angels’ designated hitter for only the second time this year. Collin Cowgill started in center field.